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Hi all, I'm about to switch on my system for the first time, and charge my two sunsynk L5.1 lifpo4 batteries. The manufacturer recommends a 50amp normal charge per battery and a dod of 90%. For the initial charge up, what do you recommend, a full charge from mains @50amp, and from then on just...

I'm just panicking a bit here, but does this seem right, charging two batteries paralleled at 100amps and using an 80 amp breaker per battery. Part of my brain says 50amps will go to each battery, another part of my brain says both breakers will trip out at start of charge.

Hi all, I've been looking at bus bars (for my sunsynk 5kw inverter and two lifpo4 batteries), on ebay and they look so small and weedy, and most likely brass not copper. So not really interested in anything from China. I did look on this forum for answers but no joy. I found a video showing a...

This is a bit of a daft question maybe, but one that has me pondering. From 63amp MCB in main consumer unit, 16mm2 armored cable running to the garage, in the garage there is a small consumer unit (lights & sockets) and the inverters own consumer unit / breaker box. Do I, A: Split the 16mm2...

A bloke from the UK asked about this on this forum a month or two ago, but I can't find his post. Regarding consumer units. Here in the uk you must have all the rcd's, mcb's, switches, contactors and anything else you need, the same manufacturer branding; including the case. If this...

Hi all, I have been looking for type B RCD's that are bi directional, as yet I have not found one. If you know of one then please let us know. EARU no Tongou no Geya no Etek no Chtai no I will edit this list as and when. Ok, it seems that no rcd's are bi directional. Ho hum.

I'm getting close to finishing the installation, and I have some nagging questions. Probably best answered by a uk sparky :) Two consumer units / breaker boxes, the left box is for ups, the right is for mains. I'm also using a transfer switch in the right box that will by pass the inverter...

When I look on ebay etc for panel specs, I find the half perc high power panels are only high power as their dimensions are massive. I can't find any high power panels that are the same or close size as my old panels. Panels that are the same dimensions seem top be a similar power out put as my...

Edited: I have a sunsynk 5kw inverter, and I plan to use (as my 2nd array) my old 1.2kw panels and grid tie, facing east for the morning sun. What does the sunsynk require to work from the grid tie? Presumably, as the grid tie has it's own mppt, the sunsynk will start to work no matter what the...

Hi all, I have a small problem. To many volts in series and to many amps in parallel. Is there a rectifier to lower the volts and up the amps slightly?

I did ask this question in another thread and got no reply, so please forgive me for asking again here, as it is important. If we try to use more than the 5000watts 21.7amps in a power cut, will it damage the inverter? Just because the ups has 32amps - 40amps going through it with pass...

As breakers are bi directional, which way do I wire them up? I have a feeling that the top of the breaker, protects what is behind it. So inverter to the top of the big breaker. Also battery to the top of the small breakers. Or have I got this wrong? The cabinet was not such a hot idea...

I have looked all over the batteries but I can't find a switch for master and slave :confused: While I'm here, do the L5.1 batteries have heat pads inside? Also, what setting in the inverter do I use, the manual has no entry for this battery in the inverter menu. Thanks for your help.

Yes it's a little crazy, but will it work? My inverter is in my garage, and I don't want to use wifi or use my modem to use offline software in my house. So what do you think? The inverters wifi (RS232 serial) to USB converter, then to a usb to ethernet converter, plug into power line adapter...

I have just stumbled across this web site, https://apkcombo.com/search/solar-assistant#gsc.tab=0&gsc.q=solar%20assistant&gsc.sort= Solar software for mobile phones, and a Windows PC / phone emulator. There's a few to choose from.

I'm looking at this RCD https://www.rapidonline.com/imo-b10r2040-30-b-40a-2p-rccb-30ma-type-b-4-mod-28-4093 But I'm not sure of it' quality. It's a good price especially when compared to some big brand names. What do you think?

This may be a stupid question. If an inverter manual states it must be protected with a 40amp device, am I correct in thinking that this means the ampage should be the same 40amp rcd, and 40amp mcb? I know it is I'm just having one of those dumb ass days. I'm just thinking (over thinking), as...

Hi, Due to the ups cable, I have to move my home lighting and socket cables from my breaker box (consumer unit) to a second breaker box 5 feet away. What connector do you use to join (extend) the cables? It would be nice if there were a connector that would replace the individual breakers...

Hi all, I am for the moment using an SMA Sunny boy SB3600 TL21 grid tie, and the manual doesn't state what rcd to fit, other than it has to be 100ma or better. The inverters max output is 16amps, 3680w, 230vac, and I'm using an ac type 63amp 30ma rcd, and a B32amp breaker (manual states max...

I haven't got this far yet (getting close), I'm thinking ahead. This maybe a stupid question, but the recommended recharge / discharge rate is 50amps for Sunsynk batteries, but if I use two batteries will that mean that I have to choose 100amps charge / discharge in the inverter settings...

This is crazy, I've been looking for a 100 - 150amp switch but I just can't find one. It has to be double pole, although I know folks are using single pole or using a breaker as a switch, all they can find? I can't use the Blue Sea switches or the cheap red switches found on AliExpress as they...

I don't do wifi, nor want to hook my inverter up to the internet, but occasionally may want to look at what it's doing on a laptop. So what am I looking for, RS485 to usb or ethernet / lan? As well as the wifi RS485, there is a RS485 ethernet socket in the inverter, apparently for a meter...

I ordered Sunsynk rack mount batteries, but got wall mounted, as it was all they had. Now there's not enough room on my walls, and I have to rack mount them. I have looked for a cabinet / rack, but all I have found is very expensive, and looking like a 1980's hifi cabinet. As these are going...

I've been looking on ebay.co.uk, Aliexpress and online vendors for 50mm2 cable for my battery breaker box to inverter. Unfortunately a lack of information & disinformation is order of the day. The cables that I have found are only for automotive batteries and low power welder cables at 50 to 60...

There are different T fuses, which is best?

The 5kw Sunsynk inverter manual states battery cable must be AWG2 35mm2, but the connectors on the Sunsynk battery are for AWG4 25mm2 cables, ok it is what it is. AWG4 25mm2 cable connector is 100a max so it would be prudent to wire it as per the picture on the right. The manual states 150a...

I'm sure I have this absolutely right, but looking at the manual I have to clarify. I don't do RCBO. The table in the Appendix D is for RCBO's, you would have thought sunsynk would have given us info on RCD & MCB also. Type A/AC I'm taking that as Type A or AC. 1) If you have an RCD take it...

What leads fit the Sunsynk L5.1 battery, BYD or CATL? I have contacted Sunsynk in the uk, who say ask someone else. At least they replied this time, emails usually go unanswered.

3.5k & 5kw inverters are not fitted with neutral earth bond contactors from new, you have to fit them. When we fit an ups system I think the majority of folks want the sockets and lighting to work, and leaving the heavy loads behind. I would think fitting just one socket for an electrical item...

My vendor has sent me two of these batteries, as a replacement for the LiFePo4 (Li-iron) BDM they couldn't supply. Are these Li-iron, or Li-ion as stated on the battery sticker? I have asked Sunsynk but they say Li-ion is LFePo4. Is there a way to find out for sure?

Finally, after three and a half months, I have been told that I will get my Sunsynk inverter in two days time (yea, and pigs might fly). Here's the question, do I have to update the bios, or configure it on line, or can I just use it straight out of the box? I don't want to fart around with...

Last night I was looking on line to find out what would be a good contactor to use for the earth bond on a 5kw inverter. While looking I came across a couple of bits of info from a South African forum, and an entry on Sunsynk.org message board (unanswered), that said the newer (late 2022...

My No1 solar array kicks out max 187volt. My No2 solar array kicks out max 297volt. My Sunsynk inverter mppt is 150 to 425volt, input 500volt max. Can someone please tell me what surge protector I need for each array; bearing in mind the inverter has to be protected up to 500volts max.

Just a quick stupid question. Why has this got 6w on the side?

I can't find any other brand of mini DC breaker that is 150amp. Is this Taixi brand any good?